Locomotive fire box



Oct. 16 1923.

LE GRAND PARISH LOCOMOTIVE FIRE BOX 1919 2 Sheets-Sheet 1 Filed July 16,

Jig. 1;

I ENTOR LE GRAND PARISH LOCOMOTIVE FIRE BOX Filed July 16.

1919 2 Sheets-Sheet 2 INVENTOR.

WITNESS Patented octle, 1923.

uu rso STAT-ES PATENT ornca.

LE GRAND PARISH, OF MOUNTAINVIEW, JERSEY, ASSIGNOR. .I'O AMERICAN 7 OOMPAHY, OF NEW YORK, N.

Y., A CORPORATION OF DELAWARE.

Locouorrvn FIRE BOX.

application filed Jul 1919. Serial No. 311,342.

To all whom it mag concern:

Be it known that I, LE GRAND PARISH, a

citizen, of the United States, residing at 16 whereby a refractory combustion chamber may be provided establishing an intense zone of heat through which the products of combustion travel, and whereby efiicient. combustion is promoted not only because of the intense heat, but also because the gases are thoroughly, admixed in their passage through the c mber.

Another object of the invention resides in the provision of improved arrangement whereby it is possible to increase the size of the circulation tubes, thereby increasing the volume of circulation and consequently making it posssible to more ra idly turn over the contents of the boiler, w ich tends to still further increase the efliciency.

Still another object of the invention resides in an improved arrangement of the circulation tubes which not only makes it possible toattam the foregoing objects, but

i which also accomodatcs itself readil to expansion and contraction structure.

The foregoin together 7 with such other objects as may hereinafter appear, I obtain -in the re box by'means of a constructionwhichI have illustrated in referred form inthe accompanying drawings, wherein:-

2 is an irregular section, enlarged, taken on the line 2-2 of Figure 1; Figure 3 is a section taken on the line 3-3 of Figure 1; and Fi re-4 is a section taken-on the line l igure 1, on enlarged scale.

Referring" now- 'more particularly to .Fi "re -1,"it' will be seen that the lfire box, 'in icated as awhole by the reference letter A., comprises- -inside and outside throat F gure 1 1s a longitudinal section through a locomotive fire box illustrating the a ppli .cation of my iniprovements thereto; Figure sheets 7 and 8, respectively; inside and outside side sheets, 9 and 10; inside and outside back sheets, 11 and 12; the crown sheets 13; the cover or roof sheet 14; the'flue sheet 15; and the dome course 16. The barrel combustion chamber is indicated by the reference letter B.

In carrying out my invention I provide a.

plurality of rows of circulation tubes, preferably four tubes to each row, with the tubes of one row in approximately the same -verti cal plane as the tubes of the other row. The tubes 17 comprising the lower row, extend rear'wardly and upwardly, from the inside throat sheet 7 to the inside back sheet 11, connecting front, and rear water legs. The bend, if any, in these tubes, is. preferably 10- cated about the middle thereof. The tubes comprisin the upper row are of peculiar configuratlon. At the front end, all of these tubes are expanded in the inside sheet of the barrel, at a point well in advance of the throat, for which purpose each tube is bent at its forward end, as at 18. From the bent portion each tube extends rearwardly fand upwardly, in substantial parallelism with the rear portion of the tubes 17, but the tubes of the upper row, instead of being expanded in the inside back sheet 11, are arranged as follows: the central tubes 19 are expanded in the crown sheet 13, and the outer tubes 20 are each respectively expanded in a side sheet. a

ment of the circulation tubes is suc that the ;two rows of tubes diverge toward the front It willbe seen that the foregoin arrangeand a maximums acing therebetween is secured, This enab es me to provide a refractory combustion chamber inthe fire box, in: dicated as a whole by thereference letter C, the construction and arrangement of which will now be described.

A transverse refractory wall 23 is supported onthe inside sheetof the barrel, intermediate such-sheet and the upper row of tubes, the wall being preferably located a short distance to the rear of the bent por-' tions" 18 of such tubes. The upper portion of the wall is formed to fit the tubes snugly J and the wall, between tubes, rojegts thereabove, for purposes which wil appear. .Su

ported on the upper row of tubes and exten ing rearwardly of the transverse wa11231 is an arch, indicated asa wholeYat .D, said arch preferably consisting of three rows of center bricks supported on the tubes, and two rows of wing bricks 24, preferably extending from the point adjacent the transverse wal 23 rearwardly, a portion of the length of the arch, said wing bricks being supported from the outer tubes and from the side sheets.

The arch is kept from sliding forwardly on the tubes by virtue of the upwardly projecting portions of the wall 23 intermedlate the tubes and the transverse wall is wedged in outer tube and from the side sheet.

spacer bricks or blocks 27.

.It will be seen from the foregoing that the arches constitute a combustion chamber, the front end portibns of which are closed at the top, sides and end, the bottomof which has a longitudinal openin or circulation space 28, between the arches and F, and a transverse opening 29 between said arches and the throat sheet; and the top of which, toward the rear, is open at each side. By this ar- .rangement' not only are the gases and prodnets of combustion thoroughly intermingled, but the walls of the combustion chamber aot as .heat storage and heat reflecting members which radiate and reflect heat from substan-' tially all sides inwardly and which establish an intense zone of heat within the combustion chamber thorugh which the major portion of the products of combustion pass and to which they are subjected. More perfect combustion is thus obtained and the efliciency with reference to fuel consumption is greatly increased. Higher temperature.

* values also obtain throughout the fire box.

It is further to be noted that the arrangement of the tubes is such that standard I forms of brick maybe accessibly and removably supported on the tubes.

In addition, it is to be observed arranging the tubes of one of the rows to discharge to the side waterlegs, and the space above the crown sheet, I am enabled to materially increase the diameter of the tubes over what would be practical were all the tubes arranged to discharge in the comparatively restricted rear water leg. 1' am, therefore, enabled to greatly increase the volumetriccapacity of the tubes and thus decrease the time required to turn over the contents of the boiler.

Finally the arrangement of the tubes is: such as Wlll not increase therigidity of the fire box structure which will readily accomodate itself to expansion and contraction. The transverse wall also relieves the upper that b row of tubes of a portion of the weight of the arch which is of importance since such tubesare bentv at both ends, I

- I claim: I

1. In a barrel type locomotive firebox, the

combination of two sets of upwardly and. 1

rearwardly extending arch tubes one above.

the other, said sets converging rearwardly and having their forward ends substantially spacedapart, an arch carried on the upper set and an arch carried on the lower set, the lower arch having a gas circulation space extending longitudinally thereof and one extending transversely at the forward portion thereof, and said arches forming a combustion chamber in the forward portion of the fire box. r I

2. Ina barrel type locomotive fire box, .the combination of two sets of upwardly and rearwardly extending arch tubes one above the other, said setsconverging rearwardly and having their forward ends sub stantially spaced apart, an arch carried on the upper set an arch carried on the lower set, and a cross wall su ported on the barrel adjacent the forward e ge of the upper arch, the lower arch having gas circulation spaces therethrough, and said arches together with said wall forming a combustion chamber in the forward portion of the fire box. a

3. In a locomotive fire box of the barrel combustion chamber type having front and rear water legs, a water space around the barrel and one above the fire box, the combinationof a setof arch tubes, extending from the front water leg to the rear water leg and a set. of'tubes above the first set extending from the water space around the too apart, an arch carried on the upper set of tubes and an arch carried on the lower set of tubes havmg gas circulation spaces therethrough, said arches forming a combustion chamber in the forward portion of the fire boxf I 4. In a locomotive fire box of the barrel and side water legs, a water space around the barrel and {one above the fire box, the combination of a set of arch tubes extending from the front water leg to the rear water leg, and a setof tubes above the first set some of which extend from the space around the barrelto the side water legs and the balance tothe space above the fire box, sa d sets converging rearwa'rdly and having their forward ends .substantially spaced apart, an arch carried on the upper set of tubes and an arch. on the lower set havin gas circulation spaces therethrough, sai

combustion chamber type having front, rear arches forming a combustion chamber in the ing a front waterleg and a-water space around the barrel, the combination of a set i of arch tubes extending upwardly and rearwardly from the front water leg, another set thereabove extending upwardly and rearwardly from the water space around the barrel, said sets converging rearwardly and having their forward ends substantially spaced apart, an arch carried on the upper set and an arch carried on the lower set, the lower arch having gas circulation spaces therethrough, and said arches 'forming a combustion chamber in the forward portion of the fire box.

6. In a locomotive firebox of the barrel combustion chamber type having a front wardly and having their forward ends substantially spaced apart, an arch carried on the upper set of tubes, and an arch carried.

on the lower set of tubes having gas circulation spaces 'therethrough, said arches forming' a combustion chamber in the forward portion of the fire box. 7. In a barrel type locomotive fire box, the

combination of two sets of upwardly and rearwardly extending arch tubes. one above the other, said sets converging rearwardly and having their forward ends substantially spaced apart, an arch carried on the upper set, an arch 03.1'118Cl'011 the lower set, and a cross wall adjacent the forward edge of the.

upper arch, the lower arch havinggas cir culation spaces therethrough, and said arches together with said wall forming a combustion chamber in the forward portion of the fire box.

In testimony whereof, I have hereunto signed my name,

' LE GRAND PARISH. 

